Greater Anglia 491Y31
View line Greater Anglia
Alerts for train 491Y31
Alerts are saved per line, not per trip id, so they keep working when the operator changes the timetable. This train runs on line Greater Anglia.
The mini-map returns when the train runs
On-time · 30 days
85%
22/26 runs under 3 min
RT coverage: 26 full · 0 partial · 0 no data
On-time · 90 days
80%
63/79 runs under 3 min
RT coverage: 79 full · 0 partial · 0 no data
Typical delay
−2min
Median at arrival, 90 days
30 days: −2 min
P90
+6min
9 in 10 runs arrive with less than this
30 days: +4 min
Last 30 days
Delay at the end of each run, in minutes. One bar per run.
- On time (<3 min)
- 3–10 min
- 10–30 min
- 30+ min
- Partial coverage
- No data
Worst days
- Mon 17 Aug Max en route +96 min · last fix heading to London Liverpool Street +94 min
- Fri 16 Oct Max en route +45 min · last fix heading to Gidea Park +43 min
- Sat 19 Sept Max en route +19 min · last fix heading to London Liverpool Street +17 min
- Sat 12 Sept Max en route +16 min · last fix heading to London Liverpool Street +14 min
- Fri 2 Oct Max en route +18 min · last fix heading to London Liverpool Street +13 min
Distribution · 90 days
79 runs with a known final delay. On time = under 3 min, the same cut the map uses.
- Early 58% · 46
- On time 22% · 17
- 3–10 min 14% · 11
- 10–30 min 4% · 3
- 30+ min 3% · 2
On-time by weekday
- 75% M n=12
- 54% T n=13
- 100% W n=13
- 92% T n=13
- 77% F n=13
- 0% S n=2
- 92% S n=13
Recent runs
| Date | Last stop | Final | Max |
|---|---|---|---|
| Fri 6 Nov | Gidea Park 10:04 | +4 min | +8 min |
| Thu 5 Nov | Gidea Park 09:59 | 0 min | +5 min |
| Wed 4 Nov | London Liverpool Street 09:58 | −3 min | +1 min |
| Tue 3 Nov | London Liverpool Street 09:54 | −3 min | +1 min |
| Mon 2 Nov | London Liverpool Street 09:58 | −2 min | +4 min |
| Sun 1 Nov | Gidea Park 21:34 | −1 min | +1 min |
| Fri 30 Oct | London Liverpool Street 10:05 | −3 min | — |
| Thu 29 Oct | London Liverpool Street 10:05 | −4 min | +4 min |
| Wed 28 Oct | London Liverpool Street 10:05 | −3 min | +1 min |
| Tue 27 Oct | London Liverpool Street 10:15 | +7 min | +12 min |
| Mon 26 Oct | London Liverpool Street 10:05 | −3 min | +2 min |
| Sun 25 Oct | Gidea Park 21:41 | −2 min | — |
| Fri 23 Oct | Gidea Park 10:07 | −1 min | +3 min |
| Thu 22 Oct | London Liverpool Street 10:04 | −4 min | — |
| Wed 21 Oct | London Liverpool Street 10:05 | −3 min | +1 min |
| Tue 20 Oct | London Liverpool Street 10:06 | −2 min | — |
| Mon 19 Oct | London Liverpool Street 10:06 | −3 min | +2 min |
| Sun 18 Oct | Gidea Park 21:41 | −2 min | — |
| Fri 16 Oct | Gidea Park 10:52 | +43 min | +45 min |
| Thu 15 Oct | Gidea Park 10:07 | −2 min | +3 min |
| Wed 14 Oct | London Liverpool Street 10:06 | −3 min | — |
| Tue 13 Oct | Gidea Park 10:12 | +4 min | +8 min |
| Mon 12 Oct | London Liverpool Street 10:05 | −3 min | +1 min |
| Sun 11 Oct | London Liverpool Street 21:44 | +1 min | +3 min |
| Fri 9 Oct | London Liverpool Street 10:06 | −2 min | +2 min |
| Thu 8 Oct | London Liverpool Street 10:10 | +2 min | +6 min |
| Wed 7 Oct | Gidea Park 10:07 | −1 min | +3 min |
| Tue 6 Oct | London Liverpool Street 10:07 | −1 min | +3 min |
| Mon 5 Oct | London Liverpool Street 10:05 | −3 min | +2 min |
| Sun 4 Oct | London Liverpool Street 21:45 | +1 min | +9 min |
Each run is closed into train_runs (country, train number, service day) from the live positions. Final delay = last delay seen. Partial coverage: the feed stopped before the final stop (last value used, hatched in the chart). No data: a run without any valid delay; counts as neither on time nor late. Data collected since 11 July 2026.